Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summarized financial information concerning our reportable segments is shown in the following table.

	Three months ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Revenue:
IAN	$	1,370.9		$	1,332.5		$	4,047.7		$	3,999.7
CMG	329.5			337.9			951.9			893.2
Total	$	1,700.4		$	1,670.4		$	4,999.6		$	4,892.9
Segment operating income:
IAN	$	119.9		$	116.6		$	266.5		$	278.6
CMG	39.7			34.4			88.3			73.1
Corporate and other	(18.1		)	(19.6		)	(80.9		)	(83.3		)
Total	141.5			131.4			273.9			268.4
Interest expense	(23.7		)	(31.6		)	(98.0		)	(96.9		)
Interest income	5.8			6.7			18.0			21.4
Other (expense) income, net	(46.6		)	1.7			(40.0		)	5.1
Income before income taxes	$	77.0		$	108.2		$	153.9		$	198.0
Depreciation and amortization of fixed assets and intangible assets:
IAN	$	32.9		$	30.1		$	95.4		$	88.4
CMG	3.9			3.9			11.6			10.6
Corporate and other	3.7			3.4			10.9			9.8
Total	$	40.5		$	37.4		$	117.9		$	108.8
Capital expenditures:
IAN	$	24.5		$	19.9		$	48.0		$	52.6
CMG	2.4			11.9			6.5			17.5
Corporate and other	17.9			9.3			37.1			29.2
Total	$	44.8		$	41.1		$	91.6		$	99.3
	September 30, 2013			December 31, 2012
Total assets:
IAN	$	10,368.3		$	11,035.3
CMG	1,182.8			1,073.1
Corporate and other	(19.1		)	1,385.5
Total	$	11,532.0		$	13,493.9